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Residual stresses in metal‐ceramic crowns
Author(s) -
DÉRAND TORE
Publication year - 1981
Publication title -
journal of oral rehabilitation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 93
eISSN - 1365-2842
pISSN - 0305-182X
DOI - 10.1111/j.1365-2842.1981.tb00477.x
Subject(s) - materials science , strain gauge , composite material , residual stress , crown (dentistry) , ultimate tensile strength , ceramic , perpendicular , metal , metallurgy , geometry , mathematics
Summary Residual stresses in metal‐ceramic crowns were examined in three different ways. First, a mathematical formula was used to calculate the stresses in the cervical part of a crown. Second, plastic models was used where the strains were measured with strains‐gauges. Third, real crowns were used and strain gauges were attached on them. The results indicated that compressive stresses appeared in the porcelain‐metal interface. Compressive stresses were also found on the surfaces of the crowns and tensile stresses perpendicular to the interface.